I'm sorry, but I would rather have the privacy encryption gives me than safety adding a backdoor would provide. Not to mention that authoritarian governments would abuse such a system left and right.
It's not just that, they have banned any mention of her name. You literally cannot even type her name in private messages without the message at least getting deleted, if you aren't banned.
Semi-unrelated question: How secure are the hardware random number generators on say, a raspberry pi. Would these sort of things be cryptographically secure?
As much as I dislike Parler, I very much so hope that ISPs don't ban it. Imagine if ISPs get to block whatever website they deem dangerous. That cannot have a good ending.